Function expr_contains

datafusion/optimizer/src/simplify_expressions/utils.rs:82–84

check volatile calls and return if expr contains needle

(expr: &Expr, needle: &Expr, search_op: Operator)

/// check volatile calls and return if expr contains needle
pub fn expr_contains(expr: &Expr, needle: &Expr, search_op: Operator) -> bool {
    expr_contains_inner(expr, needle, search_op) && !needle.is_volatile()
}

/// Deletes all 'needles' or remains one 'needle' that are found in a chain of xor
/// expressions. Such as: A ^ (A ^ (B ^ A))